I sometimes use explicit commits to log usage stats, which I want to succeed even if the request later aborts. I use a separate database connection not attached to the transaction. I tried to use pyramid_tm commit multiple times but it seemed it could only be used once. So you're supposed to use transaction.commint/abort followed immediately by transaction.begin? That wasn't clear in the docs.
I've also used a custom transaction adapter to get a Redis session attached to the transaction. Since Redis is non-transactinal, t saves its pending work in the object, and on commit it writes it to the database. On Fri, Feb 7, 2020 at 9:04 AM Michael Merickel <[email protected]> wrote: > > pyramid_tm does have a configurable activate_hook that you can use to turn > off the TM for certain endpoints. You would need to coordinate that with > something else that managed the transaction. If I were doing it myself I'd > probably configure my activate hook to return true/false based on an custom > attribute on the request like `request.activate_tm`. I'd then set this to > False in a tween mounted over pyramid_tm. The reason I'd do it this way is > because if you're turning off pyramid_tm then you probably still need to do > something to manage the connection - and a tween would be a good spot to do > this. > > That being said, I'd ask why you would want to turn it off instead of just > committing multiple times? You just need to use `request.tm.commit()`, > `request.tm.abort()` and `request.tm.begin()` instead of > `request.dbsession.commit()`. Make sure to always call begin after > commit/abort and things should work fine - whether it's a good idea or not in > general (see Mikko's comments) is a separate question. > > - Michael > > On Thu, Feb 6, 2020 at 7:03 PM Jonathan Vanasco <[email protected]> wrote: >> >> one of my apps uses pyramid_tm, but has reached a point where one (possibly >> two) views (out of dozens) need to make explicit commits with the SqlAlchemy >> session. >> >> does anyone know if it's currently possible to handle this? i have a few >> apps that only integrate pyramid_tm on a small subset of views, but i >> haven't tried to bypass it on a single view in many years. I'm trying to >> avoid a secondary database connection, because this app can support a sqlite >> database and I've had problems with too many connections and sqlite in the >> past. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "pylons-discuss" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/pylons-discuss/c3d3f561-8bcc-4c20-b1e8-f2aa147483f0%40googlegroups.com. > > > > -- > > Michael > > -- > You received this message because you are subscribed to the Google Groups > "pylons-discuss" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/pylons-discuss/CAKdhhwENeR4239BK2cNYTudNn28-uiDTkWQX%3D4GhkqgwrwNG_g%40mail.gmail.com. -- Mike Orr <[email protected]> -- You received this message because you are subscribed to the Google Groups "pylons-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/pylons-discuss/CAH9f%3Duq890OGO-xVWqx0Dcu_kBeoNqBb%3DfbiwnWZ6xZAUZRz1g%40mail.gmail.com.
